Load-Independent Class E−1 Voltage-Driven Synchronous Rectifier

This paper proposes load-independent class E
⁻¹
voltage-driven synchronous rectifier. This circuit is capable of maintaining Zero-Current Switching (ZCS) and a constant dc output voltage over a wide range of load resistance without additional elements or control systems. In this paper, an analysis under arbitrary duty ratio and design equations based on the circuit theory are presented. A design example of the proposed circuit is shown, and its operation was verified by simulation using LTspice XVII and experiment. Load-independent operation was confirmed as per theory when the load resistance was above the rated value (including the open state).